And strangely enough he is listed by the Canucks,etc as having worn #30 in that game. The picture may well be from a preseason game. There are also several Getty images of him "warming up" prior to an NHL game in 1990, wearing 31. My best guess is when the Canucks signed Bob Mason on December 1 (4 days before McKichan's game) they gave him 31 and Mckichan changed to 30.